- 行业: Printing & publishing
- Number of terms: 178089
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- Company Profile:
McGraw Hill Financial, Inc. is an American publicly traded corporation headquartered in Rockefeller Center in New York City. Its primary areas of business are financial, publishing, and business services.
The mule is a hybrid sired by a male ass (<i>Equus asinus</i>) out of a female horse (<i>E. caballus</i>). The opposite cross, very seldom made, produces the hinny (a hybrid between a stallion and a female ass). The mule and the hinny are usually sterile, but there have been two authenticated cases of mules producing living progeny. Male mules, often called horse mules, are almost always castrated to make them more tractable as work animals.
Industry:Science
The nearest large cluster of galaxies and one of the best studied. It dominates the distribution of bright galaxies in the sky, forming a conspicuous clump in the distribution of easily visible elliptical and spiral galaxies. The clump lies mostly in the constellation of Virgo but also extends into neighboring constellations, especially Coma Berenices. The well-known spirals M58, M61, and M100, for example, are members of the Virgo Cluster.
Industry:Science
The process of extracting rock material from the outer portions of the Earth's crust. The shape of the excavated space is dependent on the geologic condition and orientation of the rock mass being quarried. This excavated space is either an open pit or an underground cavity that is accessed by tunnel or shaft. An underground quarry is usually called a mine, even though the process for making the excavation is usually the same as on the surface.
Industry:Science
The selection of materials and member type, size, and configuration to carry loads in a safe and serviceable fashion. In general, structural design implies the engineering of stationary objects such as buildings and bridges, or objects that may be mobile but have a rigid shape such as ship hulls and aircraft frames. Devices with parts planned to move with relation to each other (linkages) are generally assigned to the area of mechanical design.
Industry:Science
The microscopic explanation of the properties of condensed matter, that is, solids and liquids, based on the fundamental laws of quantum mechanics. Without the quantum theory, some properties of matter, such as magnetism and superconductivity, have no explanation at all, while for others only a phenomenological description can be obtained. With the theory, it is at least possible to comprehend what is needed to approach a complete understanding.
Industry:Science
The largest subclass of the class Bivalvia in the phylum Mollusca. Eulamellibranchs are ciliary filter feeders with greatly enlarged ctenidia, in each of which the elongated gill filaments are held together in parallel series to form folded lamellae. The 30,000 living species constitute the most successful of molluscan groups, in terms both of individual numbers with their biomass and of ecological bioenergetics (calorie transfer in food chains).
Industry:Science
The quantum theory of the gravitational field; also, the study of quantum fields in a curved space-time. In classical general relativity, the gravitational field is represented by the metric tensor <i>g</i><sub>μν</sub> of space-time. This tensor satisfies Einstein's field equation, with the energy-momentum tensor of matter and radiation as a source. However, the equations of motion for the matter and radiation fields also depend on the metric.
Industry:Science
The study of the motion of a rigid body under the influence of forces. A rigid body is a system of particles whose distances from one another are fixed. The general motion of a rigid body consists of a combination of translations (parallel motion of all particles in the body) and rotations (circular motion of all particles in the body about an axis). Its equations of motion can be derived from the equations of motion of its constituent particles.
Industry:Science
The membranous lining of the coelomic, especially the abdominal, cavity, composed mainly of flattened epithelial cells that produce a small amount of watery, or serous, fluid. In the embryo the coelomic wall is lined by this membrane, which continues over the developing viscera so that they are suspended and supported by the reflected peritoneum, principally from the dorsal body wall, but also from the ventral body wall in the region of the liver.
Industry:Science
The relationship in the special theory of relativity between the sets of coordinates (t,x,y,z) and (<i>t</i><sup>′</sup>,<i>x</i><sup>′</sup>,<i>y</i><sup>′</sup>,<i>z</i><sup>′</sup>) used to label events in spacetime by two inertial observers, <i>O</i> and <i>O</i><sup>′</sup>, who are moving with respect to each other. Many of the effects predicted by special relativity can be derived in a direct manner from the Lorentz transformation formulas.
Industry:Science
